Jewish law does not permit eating pork. This fact found its way into restaurant slang, where “Hebrew enemies” became the slang for an order of pork chops. ”Couple of Hebrew enemies Two pork chops” was cited in print in 1932.
Diner slang of this type became rare after 1960, and “Hebrew enemies” is mostly of historical interest today.
Pg. 29 ("Lunch-Wagon Slanguage"):
Couple of Hebrew enemies Two pork chops
February 1936, American Speech, “Linguistic Concoctions of the Soda Jerker” by Harold W. Bentley, pg. 43:
HEBREW ENEMIES, A COUPLE OF. Two pork chops.
Good Old Days Presents Hometown Memories
By Ken Tate and Janice Tate
Berne, IN: House of White Birches
“I’ll take two pork chops on the special.”
“Lay a couple of Hebrew enemies on a blue plate!“
Hash House Lingo:
The Slang of Soda Jerks, Short-Order Cooks, Bartenders, Waitresses, Carhops and Other Denizens of Yesterday’s Roadside
By Jack Smiley
Mineola, NY: Dover Publications, Inc.
2012 (Originally published in 1941)
Hebrew enemies—pork chops